Housing for open-end spinning turbine

ABSTRACT

A housing for open-end spinning turbines operable at subatmospheric pressure and rotatable selectively in clockwise and counterclockwise direction, which has conduit means through which air is withdrawn from the housing in a direction tangential to the periphery of the spinning turbine but in a direction opposite to the respective direction of rotation of the spinning turbine.

United States Patent [191 Wehling et a1.

[ HOUSING FOR OPEN-END SPINNING TURBINE [75] Inventors: Rolf Wehling; Rolf Neubert, both of Bremen, Germany [73] Assignee: Fried. Krupp Gesellschaft mit beschrankter Haftung, Essen, Germany 22 Filed: May 9,1973

[21] App1.No.:358,804

[30] Foreign Application Priority Data May 12, 1972 Germany 2223068 [52] US. Cl. 57/58.89 [51] Int. Cl DOlh 7/00 [58] Field of Search 415/144, 148, 152, 145; 60/42; 57/5889, 58.91, 58.93, 58.95

[56] References Cited UNITED STATES PATENTS 118,840 9/1971 Briggs 415/152 388,969 9/1888 Haden.... 415/152 680,406 8/1901 Charles 415/152 Aug. 12, 1975 819,752 5/1906 Gilmore 415/152 983,137 1/1911 Heald 415/152 1,778,331 10/1930 McDowelL 415/145 3,270,417 9/1966 Strarn 415/152 3,359,907 12/1973 Bochan 415/152 3,51 1,043 5/1970 Schiltknecht 57/5889 3,535,868 10/1970 Schiltknecht 57/5895 FOREIGN PATENTS OR APPLICATIONS 10,619 5/1902 United Kingdom 415/152 449,486 4/1968 Switzerland 57/5895 Primary ExaminerWil1iam L. Freeh Assistant ExaminerL., J. Casaregola Attorney, Agent, or FirmWa1ter Becker 5 7] ABSTRACT A housing for open-end spinning turbines operable at subatmospheric pressure and rotatable selectively in clockwise and counterclockwise direction, which has conduit means through which air is withdrawn from the housing in a direction tangential to the periphery of the spinning turbine but in a direction opposite to the respective direction of rotation of the spinning turbine.

8 Claims, 3 Drawing Figures HOUSING FOR OPEN-END SPINNING TURBINE The present invention relates to a housing for openend spinning turbines which are operated at subatmospheric pressure and which have a passage system through which air is withdrawn from the region of the spinning turbine.

The air withdrawal serves various purposes, especially to aid in the transport of the fibers into the turbine, to cool the high speed turbine and to withdraw possibly occurring dust and lint. In this connection it is necessary, taking into consideration the high speed of the turbine, so to guide the air in the turbine housing that no whirl and no deposits will be created in the housing. This is taken into consideration in connection with spinning turbines operating in one definite direction of rotation by withdrawing the air from the region of the spinning turbine tangentially counter to the direction of rotation of the spinning turbine.

For selectively producing yarns with S- or Z-twist, it is, however, necessary to operate the spinning turbine in both directions of rotation. In this connection, difficulties are encountered with regard to the guiding of the air in such a way that no turbulence and no deposits will form.

It is, therefore, an object of the present invention to provide the housing for subatmospheric pressure spinning turbines with a passage system which will permit operating the spinning turbine in both directions of rotation while meeting the requirements for guiding the air in such a way that turbulence and deposits will be avoided.

This object and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, in which:

FIG. 1 diagrammatically illustrates a section through a housing according to the invention of an open-end spinning turbine.

FIG. 1 is a section through the spinning rotor as well as the upper section of the housing of FIG. 1.

FIG. 2 is a section similar to that of FIG. 1 through another embodiment of a housing according to the invention of an open-end spinning turbine.

The objects of the present invention may be realized in two ways. One solution starts with a passage system for withdrawing air according to which the tangential withdrawal of the air is effected in a direction counter to the direction of rotation of the spinning turbine. More specifically, for the clockwise and the counterclockwise rotation of the spinning turbine, two separate passages are provided through which the air is selectively tangentially withdrawn in a direction opposite to the respective direction of rotation of the spinning turbine. The two withdrawing passages are expediently arranged symmetrically with regard to the transverse plane of symmetry while a central slide is operable to alternately open one or the other passage.

According to another solution suggested in conformity with the present invention, the housing is on one side of the spinning turbine provided with a radial withdrawal slot which extends through the entire diameter range and from which the air is centrally withdrawn through a suction head. According to a preferred de sign of this embodiment, the suction slot has a constant width in the region of the spinning turbine.

Referring now to the drawings in detail, FIGS. 1 and 2 show a section through a housing of an open-end spinning turbine operating at subatmispheric pressure, the section being taken transverse to the axis of rotation of the spinning turbine.

More specifically, FIG. 1 shows an arrangement according to which for the clockwise and counterclockwise rotation of the spinning turbine or rotor l the housing 2 is provided with two separate passages 3, 3a which are arranged tangentially with regard to the turbine or rotor. Depending on the direction of rotation of the turbine or rotor, the air may selectively be withdrawn from the region of the turbine or rotor through one of the two passages 3, 3a in the direction counter to the direction of rotation of the turbine or rotor.

According to the specific showing of FIG. 1, the passages 3, 3a in the housing are arranged expediently as an image to each other; and by shifting the central slide 5 in one or the other direction indicated by the double arrow a, the passages 3, 3a may selectively be connected with the suction lines 4, 4a respectively. The suction lines 4, 4a may either be stationary and the communication thereof with the passages 3, 3a may be controlled by the openings 50, 5b in the slide 5, or there may be provided only one suction line 4 which is connected to the slide 5 and is moved therewith so as to be alternately connected to the passage 3 or the passage 3a through one and the same opening 5a.

The suction lines 4, 4a are fastened by way of nipple means 4 and 4" respectively on the housing 2, and the suction lines are connectable by way of the openings 5a, 5b with the passages 3, 3a respectively.

According to the second embodiment of the invention and illustrated in FIG. 2, in the housing 2 on one side of the spinning turbine or rotor 1 there is provided a radial suction slot 6 which extends over the entire diameter range of the spinning turbine. This suction slot 6 extends over the entire necessary width of the housing. According to a preferred design of the present invention, the suction slot has a constant width in the region of the spinning turbine.

From the slot 6, the air is withdrawn through a funnelshaped portion 7a and the suction opening 7b which is located centrally with regard to slot 6 and radially with regard to the axis of rotation of the turbine or rotor l and which communicates with the centrally located suction line 70. According to the specific showing in the drawing, the suction opening 7b and the suction line are arranged on the suction head 7 to which the housing 2 is detachably connected. With the embodiment of FIG. 2 and, more specifically, in view of the central withdrawal of the air through the suction opening 7b, the slide system 5 of FIG. 1 is not necessary.

As will be seen from the above, both embodiments of the invention as illustrated in FIGS. 1 and 2 are suitable so to effect the withdrawal of air that the formation of whirl and deposits will be avoided regardless of whether the turbine rotates in clockwise or in counterclockwise direction.

It is, of course, to be understood that the present invention is, by no means, limited to the specific showing in the drawings but also comprises any modifications within the scope of the appended claims.

What we claim is:

I. A housing for an open-end spinning rotor rotatable in clockwise and counterclockwise directions and operable at subatmospheric pressure, which includes in combination, chamber means for receiving a spinning rotor, two conduits respectively connectable to a suction device, said conduits being tangentially oriented with respect to said rotor, one of said conduits defining a suction outlet for tangential air withdrawal in the clockwise direction of rotor rotation and the other of said conduits defining a suction outlet for tangential air withdrawal in the counterclockwise direction of rotor rotation, and control means associated with said conduits and operable selectively to close off either one of said conduits while simultaneously leaving the respective other one of said conduits open for connection to said suction device.

2. A housing for an open-end spinning rotor rotatable in clockwise and counterclockwise directions and operable at subatmospheric pressure, which includes in combination, chamber means for receiving a spinning rotor, and suction conduit means for Withdrawing air from said chamber, said suction conduit means having a divergent funnel-shaped portion leading into said chamber, said funnel-shaped portion diverging to a width sufficient to span substantially the entire diameter of said spinning rotor, said funnel-shaped portion defining a flow path for tangential air Withdrawal from said chamber for either clockwise or counterclockwise rotor rotation.

3. A housing in combination according to claim 1, in which said conduit means comprise two separate conduits respectively connectable to a suction device and control means associated with said conduits and operable selectively to close off either one of said conduits while simultaneously leaving the respective other one of said conduits open for connection to a suction device.

4. A housing in combination according to claim 3, in which said control means includes a reciprocable slide having a bore therethrough alternately connectable with either one of said conduits.

5. A housing in combination according to claim 4, in which said slide includes nipple means arranged in alignment with said bore and connectable to a hose.

6. A housing in combination according to claim 3, which includes a reciprocable slide having two bores therethrough adapted respectively to be aligned with said conduits, said bores being spaced from each other by a distance less than the distance between said conduits so that only one of said bores at a time can be aligned with the pertaining conduit.

7. A housing in combination according to claim 1, in which said conduit means comprises a single conduit having a slot extending over the entire diameter length of a spinning rotor to be mounted in said housing, said slot having a substantially central bore connectable to a suction device.

8. A housing in combination according to claim 7, in which said slot has a substantially uniform width within the range of the spinning rotor to be arranged within 

1. A hoUsing for an open-end spinning rotor rotatable in clockwise and counterclockwise directions and operable at subatmospheric pressure, which includes in combination, chamber means for receiving a spinning rotor, two conduits respectively connectable to a suction device, said conduits being tangentially oriented with respect to said rotor, one of said conduits defining a suction outlet for tangential air withdrawal in the clockwise direction of rotor rotation and the other of said conduits defining a suction outlet for tangential air withdrawal in the counterclockwise direction of rotor rotation, and control means associated with said conduits and operable selectively to close off either one of said conduits while simultaneously leaving the respective other one of said conduits open for connection to said suction device.
 2. A housing for an open-end spinning rotor rotatable in clockwise and counterclockwise directions and operable at subatmospheric pressure, which includes in combination, chamber means for receiving a spinning rotor, and suction conduit means for withdrawing air from said chamber, said suction conduit means having a divergent funnel-shaped portion leading into said chamber, said funnel-shaped portion diverging to a width sufficient to span substantially the entire diameter of said spinning rotor, said funnel-shaped portion defining a flow path for tangential air withdrawal from said chamber for either clockwise or counterclockwise rotor rotation.
 3. A housing in combination according to claim 1, in which said conduit means comprise two separate conduits respectively connectable to a suction device and control means associated with said conduits and operable selectively to close off either one of said conduits while simultaneously leaving the respective other one of said conduits open for connection to a suction device.
 4. A housing in combination according to claim 3, in which said control means includes a reciprocable slide having a bore therethrough alternately connectable with either one of said conduits.
 5. A housing in combination according to claim 4, in which said slide includes nipple means arranged in alignment with said bore and connectable to a hose.
 6. A housing in combination according to claim 3, which includes a reciprocable slide having two bores therethrough adapted respectively to be aligned with said conduits, said bores being spaced from each other by a distance less than the distance between said conduits so that only one of said bores at a time can be aligned with the pertaining conduit.
 7. A housing in combination according to claim 1, in which said conduit means comprises a single conduit having a slot extending over the entire diameter length of a spinning rotor to be mounted in said housing, said slot having a substantially central bore connectable to a suction device.
 8. A housing in combination according to claim 7, in which said slot has a substantially uniform width within the range of the spinning rotor to be arranged within said housing. 